I thought the Mahdi

Many of the world's population lacks electricity, especially at night when photovoltaic systems do not work, so researchers are seeking to develop new devices and mechanisms capable of generating electricity at night, so that they can run a wide range of service applications including low-power light sensors.

Improved electrical thermal system
On September 12, 2019, researchers at Goal magazine reported that they developed a device that uses radiative cooling to generate electricity from cold weather at night. Facing the sky by passing its temperature to the surrounding environment as a thermal radiation.

As a result, it loses part of its temperature to become colder than the surrounding environment, and the system generates electricity by taking advantage of the resulting temperature difference. The system generated 25 megawatts of electricity per square meter, and the system was able to turn on a small LED light, emitting faint light radiation from a California home.

This work reveals the possibility of developing more renewable technologies that can utilize the coldness of outer space as a renewable energy resource.

LED light from the cold of the night (the island)

Night power cell
Researchers believe that this innovation forms the basis of complementary solar technology, and although the output of this innovative energy is small, it can operate at times when solar cells cannot be available for use.

Despite all the benefits of solar energy, it is not available 24 hours a day. Most of us return from work at sunset, and the demand for electricity is rising to meet our heating, cooking, entertainment and lighting needs.

Unfortunately, we often rely on fossil fuels to make up for this shortfall, so when some are forced to live outside the network of service extensions, they will be forced to limit their options to meet their daily needs.

Simple capabilities are available to everyone
Researchers developed this system of inexpensive and affordable materials, assembling a cheap thermoelectric generator, and tying it to a black aluminum disc to emit heat to the surrounding environment while facing the sky.

The generator was placed inside a tightly sealed polystyrene container with an infrared window, connected to one small LED light, and then placed on a one meter high table on a rooftop in Stanford for six hours at night. Temperature that night to below zero.

They also measured energy production over the course of the six hours, and found it generates up to 25 milliwatts of energy per square meter.

The team believes that the device could be developed for practical use, and researchers expect that they can work on this system so that it is able to produce electric energy twenty times stronger than its current production.